WO2010127566A1

WO2010127566A1 - Antenna designing method and data card mono-plate of wireless terminal

Info

Publication number: WO2010127566A1
Application number: PCT/CN2010/070407
Authority: WO
Inventors: 兰尧; 孙树辉; 雷平; 范毅; 郑志泰; 谢艳萍; 班永灵
Original assignee: 华为终端有限公司
Priority date: 2009-05-08
Filing date: 2010-01-29
Publication date: 2010-11-11
Also published as: JP2012526424A; EP2429031A1; EP2429031A4; JP5472662B2; CN101540432B; US20120050113A1; US8659485B2; US9130260B2; CN101540432A; US20120314381A1

Abstract

The embodiments of the present invention disclose an antenna designing method and a data card mono-plate of a wireless terminal. The antenna designing method provided by the embodiment of the present invention includes: a half-sealed area without other metal wirings is partitioned off from the data card mono-plate of the wireless terminal. The antenna wirings are arranged within the half-sealed area. There are gaps between the antenna wirings and the data card mono-plate. The antenna wirings are coupled with the data card mono-plate via the gaps. A data card mono-plate of the wireless terminal is also disclosed by the embodiment of the present invention. By the embodiments of the present invention, the Specific Absorption Rate(SAR) value of the antenna can be reduced and the operational bandwidth of broadband can be realized.

Description

Antenna design method and data card single board of wireless terminal

The present invention relates to the field of wireless communication technologies, and in particular, to an antenna design method and a data card board of a wireless terminal. Background technique

When designing the antenna on the data card of the wireless terminal, the technical problems include: The effective space of the antenna area is small; the requirements of the SAR (Specific Absorption Rate) value are strictly required.

SAR represents the amount of radiation that an organism (including the human body) is allowed to absorb per unit kilogram. It is the most direct test value indicating the effect of radiation on the human body. The lower the SAR value, the less the radiation is absorbed. current

When the SAR test specification is required to test the SAR value, the distance from each side of the data card to the human body model for SAR testing shall not exceed 5 mm, and the SAR value shall not exceed 1.2 mw/lg. Therefore, effectively reducing the SAR value without affecting other wireless performance indicators is an urgent problem to be solved. At the same time, wireless communication has more and more requirements on the working bandwidth of the antenna. It is hoped that one antenna can simultaneously have multiple working frequency bands on the ultra-wideband.

When designing antennas on data cards, built-in antennas in the form of Inverted-F Antenna (IFA) and Planar Inverted-F Antenna (PIFA) are widely used. These forms of antennas are widely used. Generally, it is located at the end of the data card, and the data card is used as the "ground" of the antenna to form a radiator.

In the process of implementing the present invention, the inventors have found that: the nature design in the prior art, on the one hand, concentrates the near-field energy radiated by the antenna, resulting in a large SAR value. On the other hand, the bandwidth of the antenna is limited and cannot meet the bandwidth demand for increased profitability.

Summary of the invention

The embodiment of the invention provides an antenna design method and a data card board of a wireless terminal, which can realize a wide frequency working bandwidth while competing for a low SAR value of the antenna.

The antenna design method of the wireless terminal provided by the embodiment of the present invention includes:

Separating a semi-enclosed area without other metal wiring on the data card board of the wireless terminal; Arranging an antenna trace in the semi-closed area, a gap is left between the antenna trace and the data card board, and the antenna trace is coupled to the data card board through the slot .

The data card board of the wireless terminal provided by the embodiment of the present invention includes:

a semi-enclosed area, located on the data card board of the wireless terminal, without other metal wiring in the semi-closed area;

An antenna trace is disposed in the semi-closed area, and a gap exists between the data card and the data card, and the data card is coupled to the data card.

According to the technical solution provided by the foregoing embodiment of the present invention, by arranging a semi-enclosed area without other metal wiring on the data card board of the wireless terminal, the antenna trace is arranged in the semi-closed area, because the data card board Generally located in the center of the wireless terminal, the antenna trace is farthest from the wireless terminal housing, so the antenna can be kept far away from the human body model during SAR testing, thereby reducing the SAR value; The data card boards are coupled by slots, so that the electric field energy in the antenna traces generates a plurality of resonance points between the slots and the data card boards, so that the working bandwidth of the broadband can be realized; and the slot coupling mode can be adopted. Dispersing the electric field energy in a long gap also helps to reduce the concentrated distribution of energy and achieve the purpose of reducing the SAR value. DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the prior art description will be briefly described below. It is obvious that the drawings in the following description are only the present invention. For some embodiments, other drawings may be obtained from those skilled in the art without any inventive labor.

1 is a schematic diagram of a method for designing an antenna of a wireless terminal according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of a data card of a wireless terminal according to an embodiment of the present invention; Another schematic diagram of the data card single board structure of the wireless terminal. detailed description

The method, device and system for transmitting and receiving multiple media streams in multimedia communication according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

It should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of them. Example. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Embodiment 1

Referring to FIG. 1, a method for designing an antenna of a wireless terminal according to an embodiment of the present invention includes: Step 11, dividing a semi-closed area i or other metal wiring without a metal wiring on a data card board of the wireless terminal;

The process implementation may be to divide a semi-closed area on one side of the data card veneer, and no other metal components are arranged on the printed board in the semi-closed area; or, the printing in the semi-closed area is cut off. board. The data card boards outside the semi-closed area are used to arrange the other metal element devices.

Step 12: Arranging an antenna trace in the semi-closed area, a gap is left between the antenna trace and the data card board, and the antenna trace is connected to the data card board through the slot coupling.

The arranged antenna traces are either printed on a printed board in the semi-closed area or soldered in the semi-closed area. The antenna traces arranged and the data card boards are separated by a non-metal medium (for example, air), and the area where the metal-free medium is distributed is the gap (the same below) of the present invention.

The antenna design method of the wireless terminal provided by the embodiment of the present invention, by dividing a semi-closed area without other metal wiring on the data card board of the wireless terminal, arranging the antenna trace in the semi-closed area, due to the data card The board is generally located in the center of the wireless terminal. At this time, the antenna trace is farthest from the outer casing of the wireless terminal product, so the antenna can be kept far away from the human body model during the SAR test, thereby reducing the SAR value; The data card boards are coupled by a gap, so that the electric field energy in the antenna trace generates a plurality of resonance points between the gap and the data card board, thereby realizing a wide frequency working bandwidth; and coupling through the slot The method can disperse the electric field energy in a long gap, and also helps to reduce the concentrated distribution of energy and achieve the purpose of reducing the SAR value.

A preferred design, the semi-enclosed area can be designed to be located on the data card board near no One end of the data communication interface of the line terminal, for example, close to the USB interface, the PCMCIA interface, the Express interface or other interfaces, is advantageous for dispersing the energy on the antenna to the portable, and competing for a low SAR value.

The above antenna traces may be designed as an E-shaped or comb-shaped plane distribution to increase the length of the gap between the antenna trace and the data card board, so that the electric field energy in the antenna trace passes through the gap and the data card. More resonance points are generated between the boards to achieve the required working bandwidth.

Optionally, one or more antenna matching points are set in a gap between the data card board and the antenna trace, and the antenna matching point may be one or a combination of capacitors, inductors, resistors, etc., to adjust the antenna to go. The position of the coupling point between the line and the data card board causes the electric field energy in the antenna trace to generate a plurality of resonance points at appropriate positions within the gap.

The RF signal is fed into the antenna through the antenna feed line and the antenna matching network. By adjusting the parameters of the antenna matching network, optimizing the shape of the antenna traces, and optimizing the gap between the data card board and the antenna traces, the resonance characteristics of the antenna can be adjusted. And by adjusting the parameters of the antenna matching point and its position in the gap, the resonance characteristics of the antenna can be further adjusted, and finally an ultra-wideband, low SAR antenna design working at 800 MHz to 2500 MHz can be realized.

A preferred design scheme is to attach a metal coupling piece to the antenna trace by arranging the antenna traces on the upper and lower layers, or all or part of the patch on the upper layer or only the lower layer. The process implementation may be to add a metal coupling piece on the upper layer, the lower layer or the upper and lower layers of the printed layer where the antenna trace is located, and a non-metal medium between the printed layer and the antenna trace between the metal coupling piece or the antenna trace The air medium is coupled. The metal coupling piece is located in the semi-closed area, and its shape is adjusted as needed, and may be any regular or irregular shape such as a rectangle, a square, a circle, a diamond, a trapezoid, or a triangle. The metal coupling piece may be completely insulated from the antenna trace, or the conductive connection may be made by adding one or more conductive connection points in place.

There is a gap between the metal coupling piece and the data card board. Coupling between the metal coupling piece and the data card veneer through the slot to achieve secondary coupling between the antenna trace and the data card veneer, that is, within the antenna trace The electric field is first coupled to the metal coupling piece, and then The metal coupling piece is slot-coupled to the data card board.

It can be understood that one or more antenna matching points disposed in the gap between the data card board and the antenna trace are also used to adjust the relationship between the metal coupling piece and the data card board. Coupling point location.

The RF signal is fed into the antenna through the antenna feed line and the antenna matching network. The resonance characteristics of the antenna can be adjusted by adjusting the parameters of the antenna matching network, optimizing the shape of the antenna trace, optimizing the shape of the metal coupling piece, optimizing the gap between the data card board and the antenna trace and the metal coupling piece. And by adjusting the parameters of the antenna matching point and its position in the slot, the resonance characteristics of the antenna can be further adjusted, and finally an ultra-wideband, low SAR antenna design operating at 800 MHz to 2500 MHz can be realized.

Embodiment 2

Referring to FIG. 2, a semi-closed region 20 having no other metal wiring is defined on a portion of the data card board 21 adjacent to the USB interface 22. The semi-closed region 20 is not limited to the rectangular shape shown in FIG. Arbitrary or irregular shapes such as squares, circles, diamonds, trapezoids, triangles, etc. The semi-closed area 20 includes: an antenna trace 23, a gap 24 between the antenna trace 23 and the data card board 21, and an antenna matching point 25. The antenna matching network 26 and the antenna feed 27 are printed on the data card board 21 outside the semi-closed area 20, and the antenna matching network 26 is located at the edge position of the semi-closed area 20, and the antenna feed line 27 passes through the antenna matching network 26. Connected to the antenna trace 23.

The shape of the antenna trace 23 may be an E shape as shown in FIG. 2, but is not limited to the E shape, and may be a flat shape such as a comb shape, and is disposed in the semi-closed region 20 by printing or welding. . The E-shaped or comb-shaped antenna trace 23 will increase the length of the gap between the antenna trace 23 and the data card board 21, so that the electric field energy in the antenna trace 23 passes through the slot 24 and the data card board 21 More resonance points are generated between them to achieve the required working bandwidth.

Placing the antenna design area 20 near the USB interface 22 facilitates dispersing the energy of the antenna onto the portable; the antenna trace 23 is printed or soldered in the antenna design area 20, since the data card board 21 is located The center of the wireless terminal, at this time, the distance of the antenna trace 23 from the wireless terminal housing Farthest away, so the antenna can be kept far away from the human torso model during SAR testing, so that P contends for low SAR values; at the same time, the antenna trace 23 can be coupled to the data card veneer 21 in the longer slot 24, so that The electric field energy in the antenna trace 23 generates a plurality of resonance points between the gap 24 and the data card veneer 21, so that a wide frequency operating bandwidth can be realized; and the electric field energy coupled through the slot can be dispersed over a long period. Within the gap, it also helps to reduce the concentrated distribution of energy and achieve the purpose of reducing SAR.

The antenna matching point 25 is located at the gap 24 between the antenna trace 23 and the data card board 21, and the antenna matching point 25 may be provided with one or more, and the position of the slit 24 may be adjusted. It is used to adjust the position of the coupling point between the antenna trace 23 and the data card board 21, so that the electric field energy in the antenna trace 23 generates a plurality of resonance points at appropriate positions in the gap.

The RF signal is fed by antenna feed 27 to antenna trace 23 via antenna matching network 26. By optimizing the shape of the antenna trace 23 and optimizing the gap 24 between the data card board 21 and the antenna trace 23, the resonance characteristics of the antenna can be adjusted; by adjusting the parameters of the antenna matching network 26, the parameters of the antenna matching point 25, and At the position on the slot 24, the resonance characteristics of the antenna can be further adjusted, and finally an ultra-wideband, low SAR antenna design operating at 800 MHz to 2500 MHz is realized.

Embodiment 3

As shown in FIG. 3, the difference between this embodiment and the second embodiment is that: the metal coupling piece 30 is attached to the antenna trace 23, and the non-printing layer is used between the metal coupling piece 30 and the antenna trace 23. The metal medium or the air medium is coupled. There is a gap 28 between the metal coupling piece 30 and the data card veneer 21, and the metal coupling piece 30 and the data card veneer 21 are coupled through the slot 28, thereby realizing the antenna trace 23 and the data card veneer 21. Secondary coupling between.

Referring to FIG. 3, a semi-closed region 20 having no other metal wiring is defined on a portion of the data card board 21 adjacent to the USB interface 22. The semi-closed region 20 may be rectangular, square, circular, diamond, trapezoidal, triangular, or the like. Arbitrary rules or irregular shapes. The semi-closed area 20 includes: an antenna trace 23, a metal coupling piece 30, a gap 24 between the antenna trace and the data card board, a gap 28 between the metal coupling piece and the data card board, and antenna matching. Point 29. Antenna matching network 26 and antenna The feed line 27 is printed on a data card board outside the semi-closed area 20, and the antenna matching network 26 is located at the edge of the semi-closed area 20, and the antenna feed line 27 is connected to the antenna trace 23 via the antenna matching network 26.

In order to increase the length of the slot 24 for coupling between the antenna trace and the data card veneer, the shape of the antenna trace 23 may be E-shaped or comb-like, and the semi-closed is printed or soldered. Within area 20. A metal coupling piece 30 is attached to the antenna trace 23, and the metal coupling piece 30 is located in the semi-closed area 20, leaving a gap 28 between the data card board 21. The metal coupling piece 30 is coupled to the data card board 21 through the slot 28. Thus, on the one hand, the antenna trace 23 is directly coupled to the data card board 21 through the slot 24; on the other hand, the antenna trace 23 first couples part of the energy to the metal coupling piece 30, and then the metal coupling piece 30 is used. The slot 28 is recoupled with the data card board 21.

The shape of the metal coupling piece 30 is not limited to the rectangular shape shown in Fig. 3, and may be any regular or irregular shape such as a square, a circle, a diamond, a trapezoid, or a triangle. The metal coupling piece 30 and the antenna trace 23 may be completely insulated or may be electrically connected by adding one or more conductive connection points (not shown in Figure 3) at appropriate locations.

Placing the antenna design area 20 near the USB interface 22 facilitates dispersing the energy of the antenna onto the portable; printing or soldering the antenna trace 23 in the antenna design area 20 allows the antenna trace 23 to be distanced from the wireless terminal The distance of the outer casing is the farthest, and the antenna is far away from the human body model during the SAR test, thereby reducing the SAR value; at the same time, the antenna trace 23 and the metal coupling piece 30 and the data card veneer 21 are coupled through the gap multiple times. A plurality of resonance points are generated to realize a wide-band operating bandwidth; and the gap coupling method can disperse the electric field energy in the antenna trace 23 and the metal coupling piece 30 in a long slit, and also contribute to weakening the concentrated distribution of energy. , to achieve the purpose of reducing SAR.

The antenna matching point 29 is located at the gap between the antenna trace 23 and/or the metal coupling piece 30 and the data card board 21, and the antenna matching point 29 may be provided with one or more, and its position at the slit may be adjusted. The antenna matching point 29 is used to adjust the antenna trace 23 and/or the metal coupling piece 30 and the data card The position of the coupling point between the plates 21 is such that the electric field energy within the antenna traces creates a plurality of resonance points at appropriate locations within the gap.

The RF signal is fed by antenna feed 27 to antenna trace 23 via antenna matching network 26. The data card board 21 and the antenna are optimized by adjusting the parameters of the antenna matching network 26, optimizing the shape of the antenna trace 23, optimizing the shape of the metal coupling piece 30, optimizing the gap 28 between the data card board 21 and the metal coupling piece 30. The gap 24 between the wires 23 can adjust the resonance characteristics of the antenna; and by adjusting the parameters of the antenna matching point 29 and its position on the slots 28 and/or 24, the resonance characteristics of the antenna can be further adjusted, and finally the work is realized. Ultra-wideband, low SAR antenna design from 800MHz to 2500MHz.

Embodiment 4

Referring to FIG. 2 and FIG. 3, a data card board of a wireless terminal according to an embodiment of the present invention includes: a semi-enclosed area 20, located on a data card board of a wireless terminal, and having no other metal wiring in the semi-closed area. ;

The semi-closed region 20 may be any regular or irregular shape such as a rectangle, a square, a circle, a diamond, a trapezoid, a triangle, or the like.

An antenna trace 23 is disposed in the semi-closed area 20, and a gap exists between the data card and the data card board, and the data card is coupled to the data card board through the gap.

Preferably, the semi-enclosed area 20 is located at one end of the data card interface near the data communication interface 22 of the wireless terminal, which facilitates the dispersion of the energy of the antenna to the portable.

Preferably, the antenna traces 23 are planarly distributed. The shape of the plane distribution may be the E shape shown in FIGS. 2 and 3, but is not limited to the E shape, and may be a flat shape such as a comb shape, and is disposed in the semi-closed region 20 by printing or welding. Inside. The E-shaped or comb-shaped antenna traces increase the length of the gap between the antenna trace and the data card board, so that the electric field energy in the antenna trace 23 is generated between the gap 24 and the data card board 21. More resonance points to achieve the required operating bandwidth.

Optionally, the data card of the wireless terminal further includes: at least one antenna matching point 25, The gap between the antenna trace 23 and the data card board is used to adjust a coupling point position between the antenna trace and the data card board.

Preferably, the data card of the wireless terminal further includes: a metal coupling piece 30, the patch is on the antenna wire 23, and a gap exists between the data card and the data card, and the slot The data card boards are coupled to achieve secondary coupling between the antenna traces and the data card board. Thus, on the one hand, the antenna trace 23 is directly coupled to the data card board 21 through the slot 24; on the other hand, the antenna trace 23 first couples part of the energy to the metal coupling piece 30, and then the metal coupling piece 30 is used. The slot 28 is recoupled with the data card board 21. At this time, the antenna matching point 29 is also used to adjust the position of the coupling point between the metal coupling piece 30 and the data card veneer, so that the electric field energy in the antenna trace generates a plurality of resonance points at appropriate positions in the slot.

The antenna trace 23 is disposed in the semi-closed area 20. Since the data card board is generally located at the center of the wireless terminal, the antenna trace is farthest from the wireless terminal housing, so that the antenna can be kept far from the SAR test. The human torso model, thereby reducing the SAR value; and the antenna trace 23 can be coupled to the data card in the longer slot 24, so that the electric field energy in the antenna trace 23 passes through the slot 24 and the data card veneer A plurality of resonance points are generated, and the metal coupling piece 30 and the data card single board 21 are coupled by the gap 28 multiple times, thereby realizing a wide frequency working bandwidth; and the electric field energy in the antenna wiring is made by the gap coupling manner. Being able to be dispersed in a long gap, the metal coupling piece and the antenna radiator itself also helps to reduce the concentrated distribution of energy and achieve the purpose of reducing SAR.

In summary, various embodiments of the present invention provide a semi-enclosed area without other metal wires on the data card board, and only include design elements such as antenna traces and slits in the semi-closed area.

Broadband, low SAR antenna design.

The above specific embodiments are not intended to limit the present invention, and any modifications, equivalents, improvements, etc., which are included in the present invention, should be included in the present invention without departing from the principles of the present invention. Within the scope of protection.

Claims

Claim

A method for designing an antenna for a wireless terminal, comprising:

Separating a semi-closed area without other metal wiring on the data card board of the wireless terminal; arranging an antenna trace in the semi-closed area, leaving a gap between the antenna trace and the data card board Coupling the antenna traces with the data card board through the slot.

2. The antenna design method according to claim 1, wherein the semi-closed area is located at one end of the data communication interface of the data card adjacent to the wireless terminal.

3. The antenna design method according to claim 1, wherein the antenna traces are distributed in a plane.

The method for designing an antenna according to claim 1, wherein at least one antenna matching point is disposed in a gap between the antenna trace and the data card board to adjust the antenna trace and The location of the coupling point between the data card boards.

The antenna design method according to any one of claims 1 to 4, wherein a metal coupling piece is attached to the antenna trace, and a gap is left between the metal coupling piece and the data card single board. Coupling between the metal coupling piece and the data card board through the slot to achieve secondary coupling between the antenna line and the data card board.

The method for designing an antenna according to claim 5, wherein at least one antenna matching point is disposed in a gap between the antenna trace and the data card board to adjust the metal coupling piece and The location of the coupling point between the data card boards.

A data card single board of a wireless terminal, comprising:

a semi-enclosed area on the data card board of the wireless terminal, and no other metal wiring in the semi-enclosed area;

An antenna trace is disposed in the semi-closed area, and a gap exists between the data card and the data card board, and the data card is coupled to the data card board.

The data card veneer according to claim 7, wherein the semi-closed area is located One end of the data communication interface of the wireless terminal on the data card board.

9. The data card veneer according to claim 7, wherein the antenna traces are distributed in a plane.

The data card veneer according to claim 7, further comprising:

The at least one antenna matching point is disposed in a gap between the antenna trace and the data card board, and is used to adjust a coupling point position between the antenna trace and the data card board.

The data card veneer according to any one of claims 7 to 10, further comprising: a metal coupling piece, wherein the patch is on the antenna routing line, and the data card veneer exists a slot, coupled to the data card veneer through the slot to implement secondary coupling between the antenna trace and the data card veneer.

The data card veneer according to claim 11, further comprising:

The at least one antenna matching point is further configured to adjust a coupling point position between the metal coupling piece and the data card veneer.